ferraus tilt

Tilt EQ: one-knob brighter or darker

Synopsis

ferraus tilt <input> [options] [-o <output>]

What it does

Raises one side of the spectrum and lowers the other around the pivot: positive --gain is brighter (highs up by gain/2, lows down by gain/2), negative is darker.

This command is also an fx stage and a pipeline op: ferraus fx in.wav -o out.wav --fx "tilt:key=value".

Examples

Brighten a dull mix

ferraus tilt mix.wav --gain +3dB -o brighter.wav

Warm up a pad

ferraus tilt pad.wav --gain -4dB --pivot 600Hz -o warmer.wav

A touch of air on a vocal while leaving its body alone

ferraus tilt vox.wav --gain +2dB --pivot 2kHz -o vox_air.wav

Very subtle darkening of a harsh master

ferraus tilt master.wav --gain -1dB --mix 50% -o master_soft.wav

Options

Flag	Type	Default	Meaning
`--pivot`	frequency	`1kHz`	Frequency that stays unchanged
`--gain`	gain	`+0dB`	Total tilt: +4dB brightens, -4dB darkens
`--mix`	percent	`100%`	Dry/wet balance: 0% returns the input unchanged, 100% is fully processed

Global options

Every command also accepts the global options (-o, --json, --dry-run, --overwrite, --progress, ...). See Global options.

Exit codes

Code	Meaning
0	Success
1	Processing failed
2	Usage or parameter error
3	Input missing or unreadable
4	Unsupported format or codec
8	Cancelled
70	Internal error (bug)

Common mistakes

Forgetting that outputs are never overwritten: pass --overwrite or a new -o path when re-running.
Gains need a unit when not in dB: 0.5x is a factor, -6 and -6dB are decibels.

For models

MCP tool: ferraus_tilt
Schema: ferraus schema tilt
Pipeline: { op: tilt, args: { ... } } (flag names with _ instead of -)
fx stage: yes

{"command": "tilt", "defaults": {"pivot": "1kHz", "gain": "+0dB", "mix": "100%"}}